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As someone who has the FabSpeed system, I can tell you I'm quite sure it is more than just two "normal" mufflers connected by a bridge pipe. Also, realize that their system is all proprietary, and does not use the stock midpipes or equivalents (such as their own by-bass pipes). It is larger than stock, and doesn't use the U-tubes, which is why their whole thing only works as one unit.
I would be interested to see dyno charts off the Maxspeed headers, as their design looks horrible.
Patrick
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